diff --git a/aworld/models/openai_provider.py b/aworld/models/openai_provider.py
index b4d9b7093..5d8e7a039 100644
--- a/aworld/models/openai_provider.py
+++ b/aworld/models/openai_provider.py
@@ -473,7 +473,7 @@ def get_openai_params(self,
             "frequency_penalty", "logit_bias", "logprobs", "top_logprobs",
             "presence_penalty", "response_format", "seed", "stream", "top_p",
             "user", "function_call", "functions", "tools", "tool_choice", "metadata",
-            "prompt_cache_key", "safety_identifier", "store", "verbosity", "extra_body"
+            "prompt_cache_key", "safety_identifier", "store", "verbosity", "extra_body","top_k"
         ]
 
         llm_params = self.kwargs.get("params", {})